diff --git a/MdePkg/Include/IndustryStandard/SmBios.h b/MdePkg/Include/IndustryStandard/SmBios.h
index 8b3c4d7ba9..def874be28 100644
--- a/MdePkg/Include/IndustryStandard/SmBios.h
+++ b/MdePkg/Include/IndustryStandard/SmBios.h
@@ -1843,6 +1843,11 @@ typedef struct {
   UINT64                                    VolatileSize;
   UINT64                                    CacheSize;
   UINT64                                    LogicalSize;
+  //
+  // Add for smbios 3.3.0
+  //
+  UINT32                                    ExtendedSpeed;
+  UINT32                                    ExtendedConfiguredMemorySpeed;
 } SMBIOS_TABLE_TYPE17;
 
 ///